From: Thomas Abraham <ta.omasab@gmail.com> To: Kevin Hilman <khilman@linaro.org> Cc: "Chander Kashyap" <k.chander@samsung.com>, "Lukasz Majewski" <l.majewski@samsung.com>, "Kukjin Kim" <kgene.kim@samsung.com>, "Mike Turquette" <mturquette@linaro.org>, "Heiko Stübner" <heiko@sntech.de>, "linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>, "Viresh Kumar" <viresh.kumar@linaro.org>, "Bartlomiej Zolnierkiewicz" <b.zolnierkie@samsung.com>, "Tomasz Figa" <tomasz.figa@gmail.com>, "Amit Kucheria" <amit.kucheria@linaro.org>, "Chanwoo Choi" <cw00.choi@samsung.com>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>, "linaro-kernel@lists.linaro.org" <linaro-kernel@lists.linaro.org>, "linux-samsung-soc@vger.kernel.org" <linux-samsung-soc@vger.kernel.org>, "Marek Szyprowski" <m.szyprowski@samsung.com> Subject: Re: [PATCH v9 4/6] ARM: Exynos: switch to using generic cpufreq driver for Exynos4210/5250/5420 Date: Fri, 29 Aug 2014 18:22:16 +0530 [thread overview] Message-ID: <CAJuA9ajtsrY7zSDMs=c6BZ0AqERoBgvq++dTF4Dn673zGMfcgQ@mail.gmail.com> (raw) In-Reply-To: <CAGa+x86jU8MR=r_xuaiorbNNyqrezb0b6Ozy-MPg9HvsARESOw@mail.gmail.com> Hi Kevin, On Wed, Aug 27, 2014 at 3:55 AM, Kevin Hilman <khilman@linaro.org> wrote: > On Tue, Aug 26, 2014 at 8:15 AM, Kevin Hilman <khilman@linaro.org> wrote: >> On Mon, Aug 25, 2014 at 10:25 PM, Chander Kashyap <k.chander@samsung.com> wrote: > > [...] > >>>> >>>> Can you clarify how you're setting the voltages to ensure stability? >>> >>> below is the diff : wip/exynos/integ >> >> Thanks. >> >> I've applied your patch, and bootup shows vdd_arm and vdd_kfc at >> 1500mV, but still when booting with cpuidle enabled (bL switcher >> disabled), I'm seeing lockups with no kernel output. With CPUidle >> disabled, things are pretty stable. >> >> What tree are you using to test this out on 5420? I'm using mainline >> v3.17-rc1 + DT patch for CPUidle and this cpufreq series. See my >> wip/exynos/integ branch at >> git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux.git. > > I mis-stated this. Actually my tree is based on the v3.17-rc1 branch > of the exynos-reference tree[1] + the above mentioned patches for > cpuidle and cpufreq. > > Also, I've narrowed down the instability a bit, and it's not related > to CPUidle. I can now trigger a boot hang even without CPUidle > enabled. Here's a quick way to cause a boot lockup. With the switcher > disabled, I enable CPUfreq and set the default governor to > performance. As soon as cpufreq driver loads, it tries to use the top > frequences for both clusters, and it hangs. > > Selectively disabling frequencies, I narrowed it down to the 1.3GHz > and 1.2GHz frequencies of the little cluster. With these commented > out in the DT, it will fully boot with the performance governor > enabled. > > So that leads to the question. Are all of the operating points in > exynos5420.dtsi valid for exynos5800, and have they been validated? I tried to recreate the boot lockup issue using the same steps you listed above for the Exynos5800 peach-pi platform (Chromebook2), but I do not see any issues. I can see both clusters with max clock speed after boot (1.8GHz and 1.3GHz). I am using v3.17-rc2 + CPUFreq Patches + max77802 regulator support patches for Chromebook2 + temp hack to set A15 voltage to 1.35V and A7 voltage to 1.3V. Sorry for the delaying in following up. Thanks, Thomas. > > Kevin > > [1]https://github.com/exynos-reference/kernel.git > -- > To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
WARNING: multiple messages have this Message-ID (diff)
From: ta.omasab@gmail.com (Thomas Abraham) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v9 4/6] ARM: Exynos: switch to using generic cpufreq driver for Exynos4210/5250/5420 Date: Fri, 29 Aug 2014 18:22:16 +0530 [thread overview] Message-ID: <CAJuA9ajtsrY7zSDMs=c6BZ0AqERoBgvq++dTF4Dn673zGMfcgQ@mail.gmail.com> (raw) In-Reply-To: <CAGa+x86jU8MR=r_xuaiorbNNyqrezb0b6Ozy-MPg9HvsARESOw@mail.gmail.com> Hi Kevin, On Wed, Aug 27, 2014 at 3:55 AM, Kevin Hilman <khilman@linaro.org> wrote: > On Tue, Aug 26, 2014 at 8:15 AM, Kevin Hilman <khilman@linaro.org> wrote: >> On Mon, Aug 25, 2014 at 10:25 PM, Chander Kashyap <k.chander@samsung.com> wrote: > > [...] > >>>> >>>> Can you clarify how you're setting the voltages to ensure stability? >>> >>> below is the diff : wip/exynos/integ >> >> Thanks. >> >> I've applied your patch, and bootup shows vdd_arm and vdd_kfc at >> 1500mV, but still when booting with cpuidle enabled (bL switcher >> disabled), I'm seeing lockups with no kernel output. With CPUidle >> disabled, things are pretty stable. >> >> What tree are you using to test this out on 5420? I'm using mainline >> v3.17-rc1 + DT patch for CPUidle and this cpufreq series. See my >> wip/exynos/integ branch at >> git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux.git. > > I mis-stated this. Actually my tree is based on the v3.17-rc1 branch > of the exynos-reference tree[1] + the above mentioned patches for > cpuidle and cpufreq. > > Also, I've narrowed down the instability a bit, and it's not related > to CPUidle. I can now trigger a boot hang even without CPUidle > enabled. Here's a quick way to cause a boot lockup. With the switcher > disabled, I enable CPUfreq and set the default governor to > performance. As soon as cpufreq driver loads, it tries to use the top > frequences for both clusters, and it hangs. > > Selectively disabling frequencies, I narrowed it down to the 1.3GHz > and 1.2GHz frequencies of the little cluster. With these commented > out in the DT, it will fully boot with the performance governor > enabled. > > So that leads to the question. Are all of the operating points in > exynos5420.dtsi valid for exynos5800, and have they been validated? I tried to recreate the boot lockup issue using the same steps you listed above for the Exynos5800 peach-pi platform (Chromebook2), but I do not see any issues. I can see both clusters with max clock speed after boot (1.8GHz and 1.3GHz). I am using v3.17-rc2 + CPUFreq Patches + max77802 regulator support patches for Chromebook2 + temp hack to set A15 voltage to 1.35V and A7 voltage to 1.3V. Sorry for the delaying in following up. Thanks, Thomas. > > Kevin > > [1]https://github.com/exynos-reference/kernel.git > -- > To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in > the body of a message to majordomo at vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2014-08-29 12:52 UTC|newest] Thread overview: 121+ messages / expand[flat|nested] mbox.gz Atom feed top 2014-07-30 8:07 [PATCH v9 0/6] cpufreq: use generic cpufreq drivers for exynos platforms Thomas Abraham 2014-07-30 8:07 ` Thomas Abraham 2014-07-30 8:07 ` [PATCH v9 1/6] clk: samsung: add infrastructure to register cpu clocks Thomas Abraham 2014-07-30 8:07 ` Thomas Abraham 2014-09-01 22:29 ` Mike Turquette 2014-09-01 22:29 ` Mike Turquette 2014-09-02 13:53 ` Thomas Abraham 2014-09-02 13:53 ` Thomas Abraham 2014-07-30 8:07 ` [PATCH v9 2/6] clk: samsung: add cpu clock configuration data and instantiate cpu clock Thomas Abraham 2014-07-30 8:07 ` Thomas Abraham 2014-09-01 22:29 ` Mike Turquette 2014-09-01 22:29 ` Mike Turquette 2014-07-30 8:07 ` [PATCH v9 3/6] ARM: dts: Exynos: add CPU OPP and regulator supply property Thomas Abraham 2014-07-30 8:07 ` Thomas Abraham 2014-07-30 11:28 ` Andreas Färber 2014-07-30 11:28 ` Andreas Färber 2014-07-31 2:55 ` Thomas Abraham 2014-07-31 2:55 ` Thomas Abraham 2014-07-31 0:37 ` Doug Anderson 2014-07-31 0:37 ` Doug Anderson 2014-07-31 3:21 ` Thomas Abraham 2014-07-31 3:21 ` Thomas Abraham 2014-07-31 3:53 ` Doug Anderson 2014-07-31 3:53 ` Doug Anderson 2014-07-31 4:06 ` Thomas Abraham 2014-07-31 4:06 ` Thomas Abraham 2014-07-31 4:08 ` Doug Anderson 2014-07-31 4:08 ` Doug Anderson 2014-07-31 4:18 ` Thomas Abraham 2014-07-31 4:18 ` Thomas Abraham 2014-08-02 3:49 ` Javier Martinez Canillas 2014-08-02 3:49 ` Javier Martinez Canillas 2014-08-04 3:00 ` Thomas Abraham 2014-08-04 3:00 ` Thomas Abraham 2014-07-30 8:07 ` [PATCH v9 4/6] ARM: Exynos: switch to using generic cpufreq driver for Exynos4210/5250/5420 Thomas Abraham 2014-07-30 8:07 ` Thomas Abraham 2014-07-31 18:32 ` Kukjin Kim 2014-07-31 18:32 ` Kukjin Kim 2014-07-31 18:40 ` Tomasz Figa 2014-07-31 18:40 ` Tomasz Figa 2014-07-31 18:54 ` Tomasz Figa 2014-07-31 18:54 ` Tomasz Figa 2014-07-31 19:25 ` Thomas Abraham 2014-07-31 19:25 ` Thomas Abraham 2014-07-31 19:30 ` Tomasz Figa 2014-07-31 19:30 ` Tomasz Figa 2014-08-04 3:24 ` Thomas Abraham 2014-08-04 3:24 ` Thomas Abraham 2014-08-22 23:54 ` Kevin Hilman 2014-08-22 23:54 ` Kevin Hilman 2014-08-23 0:02 ` Tomasz Figa 2014-08-23 0:02 ` Tomasz Figa 2014-08-25 6:53 ` Lukasz Majewski 2014-08-25 6:53 ` Lukasz Majewski 2014-08-25 12:15 ` Chander Kashyap 2014-08-25 12:15 ` Chander Kashyap 2014-08-25 15:32 ` Kevin Hilman 2014-08-25 15:32 ` Kevin Hilman 2014-08-25 15:56 ` Tomasz Figa 2014-08-25 15:56 ` Tomasz Figa 2014-08-26 4:54 ` Viresh Kumar 2014-08-26 4:54 ` Viresh Kumar 2014-08-26 5:25 ` Chander Kashyap 2014-08-26 5:25 ` Chander Kashyap 2014-08-26 15:15 ` Kevin Hilman 2014-08-26 15:15 ` Kevin Hilman 2014-08-26 22:25 ` Kevin Hilman 2014-08-26 22:25 ` Kevin Hilman 2014-08-29 12:52 ` Thomas Abraham [this message] 2014-08-29 12:52 ` Thomas Abraham 2014-08-29 15:03 ` Kevin Hilman 2014-08-29 15:03 ` Kevin Hilman 2014-09-01 8:47 ` Thomas Abraham 2014-09-01 8:47 ` Thomas Abraham 2014-09-02 19:32 ` Kevin Hilman 2014-09-02 19:32 ` Kevin Hilman 2014-09-03 4:26 ` Thomas Abraham 2014-09-03 4:26 ` Thomas Abraham 2014-09-03 13:18 ` Thomas Abraham 2014-09-03 13:18 ` Thomas Abraham 2014-09-03 23:15 ` Kevin Hilman 2014-09-03 23:15 ` Kevin Hilman 2014-09-04 10:22 ` Thomas Abraham 2014-09-04 13:30 ` Kevin Hilman 2014-09-04 13:30 ` Kevin Hilman 2014-09-05 13:41 ` Thomas Abraham 2014-09-05 13:41 ` Thomas Abraham 2014-08-25 8:11 ` Sjoerd Simons 2014-08-25 8:11 ` Sjoerd Simons 2014-07-30 8:07 ` [PATCH v9 5/6] cpufreq: exynos: remove exynos4210/5250 specific cpufreq driver support Thomas Abraham 2014-07-30 8:07 ` Thomas Abraham 2014-07-30 8:07 ` [PATCH v9 6/6] clk: samsung: remove unused clock aliases and update clock flags Thomas Abraham 2014-07-30 8:07 ` Thomas Abraham 2014-07-31 14:13 ` Tomasz Figa 2014-07-31 14:13 ` Tomasz Figa 2014-07-31 18:24 ` Thomas Abraham 2014-07-31 18:24 ` Thomas Abraham 2014-07-31 18:35 ` Tomasz Figa 2014-07-31 18:35 ` Tomasz Figa 2014-07-31 18:41 ` Thomas Abraham 2014-07-31 18:41 ` Thomas Abraham 2014-07-31 18:46 ` Tomasz Figa 2014-07-31 18:46 ` Tomasz Figa 2014-07-31 18:49 ` Thomas Abraham 2014-07-31 18:49 ` Thomas Abraham 2014-09-01 22:31 ` Mike Turquette 2014-09-01 22:31 ` Mike Turquette 2014-07-31 6:20 ` [PATCH v9 0/6] cpufreq: use generic cpufreq drivers for exynos platforms Chander M. Kashyap 2014-07-31 6:20 ` Chander M. Kashyap 2014-07-31 10:59 ` Thomas Abraham 2014-07-31 10:59 ` Thomas Abraham 2014-07-31 12:24 ` Chander M. Kashyap 2014-07-31 12:24 ` Chander M. Kashyap 2014-07-31 14:15 ` Tomasz Figa 2014-07-31 14:15 ` Tomasz Figa 2014-07-31 18:25 ` Thomas Abraham 2014-07-31 18:25 ` Thomas Abraham 2014-07-31 18:34 ` Thomas Abraham 2014-07-31 18:34 ` Thomas Abraham 2014-08-01 9:42 ` Viresh Kumar 2014-08-01 9:42 ` Viresh Kumar
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